<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container {
            width: 375px;
            height: 500px;
            outline: 1px solid red;
            display: flex;
            /* flex换行 */
            flex-wrap: wrap;
            /* justify-content: space-around; */
            /* align-items: center; */
            align-content: space-evenly;
        }
        .container div {
            width: 100px;
            height: 100px;
            background-color: rosybrown;
        }
    </style>
</head>
<body>
    <div class="container">
        <div>1</div>
        <div>2</div>
        <div>3</div>
        <div>4</div>
        <div>5</div>
        <div>6</div>
        <div>7</div>
        <div>8</div>
    </div>
</body>
</html>